Convert uploaded picture to thumbnail picture + Blobstore

Question

Questions:

1. In Google App Engine Blobstore, is there a way to convert the original picture uploaded to thumbnail picture?

2. Is converting the picture to thumbnail picture a good idea or there are better ways?

3. What are the best optimization if I wish to use thumbnail picture as well as normal pictures? What I meant is that, shall I waste additional storage just to store the thumbnail pictures?

Performance is preferred very much. Thank you in advance for who's willing to help !

Answer 1

You don't necessarily need to store additional thumbnail versions of pictures. Check out get_serving_url().

You can use that function to generate a -public, but not guessable- URL to the picture with parameters to do resizing on the fly and it's optimized for performance. I think it's well suited for your needs.